Improvement in attaching- knobs to doors



d interposing rigid washersto fill the space.

i defects ;V and N waitedY tant am wie CHARLES-r, LANGFRD, orv BROOKLYN, New YoRK.

l `Letters Patent No.97,654, dated December 7, 1869.

"Thschedule referred to in these Letters Patent and making part of the same.

vented. a new-l and `useful Improvement in Attaching Knobs to Doors; andI hereby declare that thefold lowingr is afull and exact,descriptou'there'o y `The knobs of latches as ordinarily .applied to doors `lare loose iu their bearings,so as to rattle and slide when taken hold of, and this, in time, results in the loosening and loss of thescrews which hold the rose,

`or that which `secures the removable knob to the spindle, and consequently ,the frequent loss of the i knob. This is owing to there being too much lateral `rnotiouof `the spindle, resulting from the `imperfect method of adaptingthe spacebetween the two knobs tothe thickness of the door, it being usually done byv It is the object of lnyinventionto 'obviate these Itconsists in iuterposing between the knobs and the rose, in the space usually illed by the washers spoken of, elastic riugs'or gaskets of India rubber' or coiled wire, Which,.acting in opposite directions, keep the 4knobs firm, and prevent `any unnecessary/looseness'or noise, and yet adm-it of their turning freely. In thedrawings I Figure l represeutsthe knobs and spindle of a door,

the latter being shown in section, and

Figure 2,` au `elevation of 'the rose, with `the knob `removed.

In carrying ,out myinvention, I dispense entirelyv with the usual rings and washers, and substitute fan annular-piece of rubbex',as`at a; b being the-spindle, c, the rose, and d, the shank or shoulder of one of the knobs; or, instead of ethis, I employ a few coils of a.

spiral spring, as of brass wire, as shown at e.` Thus the space-is filled, and the spring or rubber being compressed, holds ythe shoulder of both 'knobs away from the rosc by pressure in oppositie directions, wholly preventing noise, and producing but slight friction, so that the vlatch may be turned with ease.

Either a coiled metal springer a rubber gasket may be used for this purpose, but, in mostl instances, the rubber is preferable, as it is easily applied and is most eiiectual in preventing noise. Y

The cost is as iuconsiclerable as that of the rigid washers heretofore used,`while there is a great saving in Athe time and labor of putting on the knobs of the lock by lnymethod, as the springs, by their elasticity, adjust themselves to the spaces, and no time' has to be spent in fitting, as in iillingiu with the rigid rings;

and a more important saving still inthe greater.dura` bility,l and avoidance of the necessity' of repairs that is thereby attained. Ii thespace is not sufiicient for the spring to be applied on both sides of the door, it will operate with nearly as good eii'ect upon one side.

I claim, as myiuventiony lhe employment ofan annular spring, of rubber or metal, between the rose and shank of the knob, in attaching knobs -to doors.4 substantially as herein set forth. 1 j

In witnesswhereof, I have hereunto signed my name,

'in the presence of two subscribing witnesses.

` CHARLES F. LANGFORD.

' Witnesses:

KATE N. JONES, J. FRASER.v 

